﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace test2_Calculator_wj.CalClasses
{
    class Minus : Calculate
    {
        public override string Cal(string str1, string str2)
        {
            A = Convert.ToDouble(str1);
            B = Convert.ToDouble(str2);
            return Convert.ToString(A - B);
        }

    }
}
